请教!

请问在SQL语言中如何将两个表相同的字段链接起来
---------------------------------------------------------------

select a.text_1+b.text_1 as text_2 from table1 a,table2 b
---------------------------------------------------------------

相同字段链接?
select column1,column2 from tableA
union
select column1,column2 from tableB

Published At
Categories with Web编程
Tagged with
comments powered by Disqus